When it sounds like a tube amp needs rejuvenating,


how can you determine whether the power tubes or the output tubes need to be replaced ?  Or both ?   

 My amp is the VAC Phi 300 running 4 Psvane CV-181's up front and two quads of Shuguang Black Treasure KT-88's behind them.  

Thanks -
-john 
dr-john

Showing 3 responses by dr-john

oh also - when a tube can no longer hold bias, it's time to replace it., right ?  

-john 
thanks - yeah, I've noticed a lack of air  and space around individual instruments - in other words, the 'magic' I love about my system.